There is an engraving on the bulb: 6v? 120v
This is for a motion-activated floodlight and I want to replace it with an LED but I don't know what to look for that fits this socket.
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It only takes a minute to sign up.Sign up to join this community
Perhaps Halogen 100W.
Not sure what the 6V is. Maybe "GV", Walmart's Great Value. They have these bulbs.
Or GY, for GY-type pin-lamp base. There are different pin spreads under the GY family, so make sure you have the right one. See also https://en.wikipedia.org/wiki/Bi-pin_lamp_base (as suggested in the comments by brhans)
Here's an overview for any interested readers:
Here's a link to the above bulb: